This is a note to let you know that I've just added the patch titled
sparc64: Fix page table walk for PUD hugepages
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
0001-sparc64-Fix-page-table-walk-for-PUD-hugepages.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fac33aa62841b69cd0e19a29b0e2ac96e4e8cf32 Mon Sep 17 00:00:00 2001
From: Nitin Gupta <nitin.m.gupta@xxxxxxxxxx>
Date: Fri, 3 Nov 2017 12:26:06 -0700
Subject: sparc64: Fix page table walk for PUD hugepages
From: Nitin Gupta <nitin.m.gupta@xxxxxxxxxx>
[ Upstream commit 70f3c8b7c2e7ebcdde8354da004872e7c9184e97 ]
For a PUD hugepage entry, we need to propagate bits [32:22]
from virtual address to resolve at 4M granularity. However,
the current code was incorrectly propagating bits [29:19].
This bug can cause incorrect data to be returned for pages
backed with 16G hugepages.
Signed-off-by: Nitin Gupta <nitin.m.gupta@xxxxxxxxxx>
Reported-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/sparc/include/asm/tsb.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sparc/include/asm/tsb.h b/arch/sparc/include/asm/tsb.h
index 25b6abdb3908..522a677e050d 100644
--- a/arch/sparc/include/asm/tsb.h
+++ b/arch/sparc/include/asm/tsb.h
@@ -217,7 +217,7 @@ extern struct tsb_phys_patch_entry __tsb_phys_patch, __tsb_phys_patch_end;
sllx REG2, 32, REG2; \
andcc REG1, REG2, %g0; \
be,pt %xcc, 700f; \
- sethi %hi(0x1ffc0000), REG2; \
+ sethi %hi(0xffe00000), REG2; \
sllx REG2, 1, REG2; \
brgez,pn REG1, FAIL_LABEL; \
andn REG1, REG2, REG1; \
--
2.13.6
Patches currently in stable-queue which might be from nitin.m.gupta@xxxxxxxxxx are
queue-4.14/0001-sparc64-Fix-page-table-walk-for-PUD-hugepages.patch